Spark-arrester



2 Sheets-Sheet L (No Model.)

J. H. SMITH.

SPARK ARRBSTER.

No. 391,658. Patented Oct. 23, 1888.

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(No Model.) 2 Sheets-Sheet 2.

J. H. SMITH.

SPARK ARRBSTBR.

No. 891,658. Patented Oo't. 23,1888.

WJTNESSES, Nv Jv R, f O @mM/04],

' UNrTED STATES PATENT @Erica JAMES HENRY SMITH, OF SULPHUR BLUFF,TEXAS.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 391,658, dated October23, 1888.

Application filed March Q4, 1888. Serial No. 268,418. (No model.)

To all whom t may concern.-

Be 1t known that l, JAMES HENRY SMITH, a

citizen of the United States, and a resident of Sulphur Bluff, in thecounty of Hopkins and State of Texas, have invented certain new anduseful Improvements in Spark-Arresters; and I do hereby declare that thefollowing is a full, clear, and exact description ofthe invention, whichwill enable others skilled in the art to which it appertains to make anduse the same, reference being had to the accompanying drawings, whichform a part of this specification, and in which- Figure 1 is a sectionalview on a longitudinal vertical plane of my improved spark-arrester.Fig. 2 is a cross-section on line x a', Fig. l. Fig. 3 is a transversesection on line y y, Fig. l; and Fig. 4 is a perspective detail view ofthe inner removable cap.

Like letters of reference denote corresponding parts in all the figures.

My invention has relation to spark-arresters of that type in which thesparks are extinguished by water contained in a suitable receptacleforming part of the apparatus; and my improvement consists in thedetailed construction and combination of parts of the l spark-arrester,which will be. hereinafter more l'ully described.

Reference being had to the accompanying drawings, the letter Adesignates the boiler, which may be stationary or portable, or be theboiler of a locomotive. B is the smokestack, lwhich receives theproducts of com bustion from the {ire-box. The upper end of thesmoke-stack is bent and doubled upon itself, as shown at C, the lowerend of the bent portion (denoted by the letter 1),) being inserted intoa trough or receiver, E, the bottom of which is in the form of aninverted pyramid, having an aperture, e, at its lower point or apex,which may be closed by a slide, or preferably by a short section ofpipe provided with a stop-cock,as shown in the drawings. Vhere thisconstruction is used the pipe leading from the bottom of the tank orreceiver E should, when the device is located inside of a buildin-g orother structure,be carried out into the open air.

Inserted into the iiat top or cover of the receiver E is the verticaloutlet-pipe F, which is surrounded by another larger pipe or jacket,

G, so as to leave an annular chamber between the two. This outside pipe,G, extends up above the mouth of the inner pipe,and is provided with acap, H, which is suspended removably upon pipe F by means of hooks l,arranged on the inside of the cylindrical cap and overlapping the mouthof the innerpipe. This construction enables the cap to be readilyremoved for cleaning or for other purposes;

and in order to prevent lateral play or oscillation of the cylindricalcap H within the annular chamber between the pipes F and G, I providethe outside of the cylinder with a series of three or more springs,J,theoutwardlyprojecting lower ends of which bear against the inner walls ofthe jacket G with a certain amount of pressure, so as to hold thecylindrical cap in its proper position.

The tank or receiver E is connected with the boiler or steam-generatorbelow the waterline by a pipe, K, (indicatedin dotted lines in Fig. 1,)which is provided with asuitablydocated valve. By opening this valvewater will be forced by the steampressure in the boiler into thereceiver, and after this has been filled or partly filled the Water isagain cut off. The sparks,which pass with the gaseous products ofcombustion'up through the bent smoke-stack B C D, are projected downinto this body of water, where they are eftectually extinguished,whilethe gaseous products pass off., If at any time the receiver should befilled with the solid products of combustion, these may be removedthrough the aperture and pipe in the lower pointed end of the receiver.

The lower part of the annular chamber between the inner and outer pipesmay, if desired, be partly filled with water through a pipe,L,connecting the lower part of this chamber with the boiler orsteam'generator below the Water-line. Any of the lighter sparks whichshould be carried by the draft across the water tank or receiver Ewithout becom-l ing immersed in the water will be intercepted by thecylindrical cap or dellector H,by which they are projected down into thewater in the bottom of the annular compartment, where they areeffectually extinguished.

Having thus described my invention, I claim and desire to secure byLetters Patent of the United StatesM ICO The combination of the boilerA,bents`moke own I have hereunto affixed my signature in stack B CD,Water trank or receiver E, outletpresence of two Witnesses. pipe F,jacket G, and cylindrical cap or deeotor H, provided with the insidehooks I JAMES HENRY SMITH' 5 and exterior springs, J, substantial] y asand for 'Witnessesz the purpose herein shown and set forth. ANDREW PIKELAUREN'S,

In testimony thatI claim the foregoing as my JOHN ROBERT FERGUSON.

